You might consider this RV Park near Denio Jct.
Royal Peacock Opal Mine - RV Park
Go digging for opals whilst you are charging!
While I personally have not traveled this particular stretch of road, I am not convinced that this route would require nothing more than ordinary preparedness for any route that is off the interstates or major US highways. These are oil roads, and NDOT and ODOT maintain them, and will post chain restrictions should there be a late-season snowstorm/blizzard. I have been told that there is a business right at the state line in Nevada that services out-of-state customers; they would hate to have a slow-down in business!
According to 2016 statistics from NDOT, state highway 140 received an average of 300-400 vehicles per day. At one time state highway transportation officials wanted an all-weather road from Winnemucca to the Pacific Ocean (Nevada had a lot of dirt roads in the remote places back in the day.) They wanted to route this road northwest from Winnemucca and then westerly into California where it would meet US299 (now California 299) northeast of Alturas. US299s' western terminus was near Arcata at the Pacific Ocean. By the time this route was finalized, it headed into Oregon to Lakeview and westerly to K-Falls and Medford.
If you all recall the dastardly deeds of the Bundynistas at the Malheur National Wildlife Refuge in January 2016, many of their minions arrived in Burns via this route.